메타데이터
| 항목 |
값 |
| Designation |
C/2024 G5 (Leonard) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2024-09-06T23:37:33.974400Z |
| Orbit solution date (soln_date, UTC) |
2024-05-07T20:12:02Z |
| Obs used |
92 |
| NEO |
- |
| M1 |
10.700 |
| K1 |
14.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2024-04-05T03:09:00.950400Z |
| Discovery magnitude (MPC) |
20.83 G |
| Discovery observatory (MPC) |
G96 · Mt. Lemmon Survey |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2024-03-23.0000000 |
| e |
0.99442966 |
| q (au) |
2.952917 |
| a (au) |
530.114505 |
| i (deg) |
50.390198 |
| Ω (om, deg) |
316.398824 |
| ω (w, deg) |
209.557081 |
| M (ma, deg) |
359.986435 |
밝기
산란 + 전체 선형
$$
M_a = (9.344 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
9.344 |
| n |
6.000 |
| gf |
0.994 |
| gb |
-1.000 |
| k |
1.000 |
| δ90 |
9.987 |
| 파라미터 |
기호 |
범위 |
설명 |
| 태양·지구거리 1 AU에서의 절대등급 |
H0 |
-5 to 20 |
혜성의 고유 밝기 |
| 광도 기울기 파라미터 |
n |
2 to 6 |
태양거리 변화에 따른 밝기 변화율 |
| 전방 산란 비대칭 계수 |
gf |
0.8 to 1 |
전방 산란의 강도 |
| 후방 산란 비대칭 계수 |
gb |
-1 to -0.5 |
후방 산란의 강도 |
| 분할 계수 |
k |
0.8 to 1 |
전·후방 산란 기여도 비율 |
| 먼지/가스 밝기 비 |
δ90 |
1 to 10 |
코마에서 먼지 산란 대비 가스 방출의 상대 기여 |
참고: EPSC-DPS2025-160
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
19:25:52.39 |
-67:14:35.5 |
HIP 95857 |
22.84 |
| 2026-05-12 12:00 |
19:25:35.65 |
-67:16:18.8 |
HIP 95857 |
24.21 |
| 2026-05-13 00:00 |
19:25:18.49 |
-67:18:01.3 |
HIP 95857 |
25.75 |
| 2026-05-13 12:00 |
19:25:00.90 |
-67:19:42.9 |
HIP 95857 |
27.45 |
| 2026-05-14 00:00 |
19:24:42.89 |
-67:21:23.8 |
HIP 95857 |
29.29 |
| 2026-05-14 12:00 |
19:24:24.45 |
-67:23:03.7 |
HIP 95857 |
31.24 |
| 2026-05-15 00:00 |
19:24:05.60 |
-67:24:42.7 |
HIP 95857 |
33.29 |
| 2026-05-15 12:00 |
19:23:46.33 |
-67:26:20.8 |
HIP 95857 |
35.42 |
| 2026-05-16 00:00 |
19:23:26.64 |
-67:27:57.9 |
HIP 95539 |
35.14 |
| 2026-05-16 12:00 |
19:23:06.54 |
-67:29:34.1 |
HIP 95539 |
34.54 |
| 2026-05-17 00:00 |
19:22:46.02 |
-67:31:09.2 |
HIP 95539 |
34.15 |
| 2026-05-17 12:00 |
19:22:25.10 |
-67:32:43.3 |
HIP 95539 |
33.97 |
| 2026-05-18 00:00 |
19:22:03.76 |
-67:34:16.3 |
HIP 95539 |
34.02 |
| 2026-05-18 12:00 |
19:21:42.02 |
-67:35:48.2 |
HIP 95539 |
34.30 |
| 2026-05-19 00:00 |
19:21:19.87 |
-67:37:19.0 |
HIP 94729 |
33.47 |
| 2026-05-19 12:00 |
19:20:57.32 |
-67:38:48.7 |
HIP 94729 |
32.61 |
| 2026-05-20 00:00 |
19:20:34.38 |
-67:40:17.2 |
HIP 94599 |
31.78 |
| 2026-05-20 12:00 |
19:20:11.04 |
-67:41:44.5 |
HIP 94599 |
29.35 |
| 2026-05-21 00:00 |
19:19:47.30 |
-67:43:10.5 |
HIP 94599 |
26.94 |
| 2026-05-21 12:00 |
19:19:23.18 |
-67:44:35.4 |
HIP 94599 |
24.55 |
| 2026-05-22 00:00 |
19:18:58.67 |
-67:45:58.9 |
HIP 94599 |
22.19 |
| 2026-05-22 12:00 |
19:18:33.77 |
-67:47:21.2 |
HIP 94599 |
19.89 |
| 2026-05-23 00:00 |
19:18:08.50 |
-67:48:42.1 |
HIP 94599 |
17.67 |
| 2026-05-23 12:00 |
19:17:42.85 |
-67:50:01.7 |
HIP 94599 |
15.59 |
| 2026-05-24 00:00 |
19:17:16.83 |
-67:51:19.9 |
HIP 94599 |
13.71 |
| 2026-05-24 12:00 |
19:16:50.44 |
-67:52:36.8 |
HIP 94599 |
12.15 |
| 2026-05-25 00:00 |
19:16:23.68 |
-67:53:52.2 |
HIP 94599 |
11.05 |
| 2026-05-25 12:00 |
19:15:56.56 |
-67:55:06.2 |
HIP 94599 |
10.57 |
| 2026-05-26 00:00 |
19:15:29.08 |
-67:56:18.7 |
HIP 94599 |
10.81 |
| 2026-05-26 12:00 |
19:15:01.25 |
-67:57:29.7 |
HIP 94599 |
11.74 |
| 2026-05-27 00:00 |
19:14:33.07 |
-67:58:39.3 |
HIP 94599 |
13.22 |
| 2026-05-27 12:00 |
19:14:04.54 |
-67:59:47.3 |
HIP 94599 |
15.10 |
| 2026-05-28 00:00 |
19:13:35.67 |
-68:00:53.7 |
HIP 94599 |
17.27 |
| 2026-05-28 12:00 |
19:13:06.46 |
-68:01:58.6 |
HIP 94599 |
19.63 |
| 2026-05-29 00:00 |
19:12:36.91 |
-68:03:01.9 |
HIP 94154 |
21.25 |
| 2026-05-29 12:00 |
19:12:07.04 |
-68:04:03.5 |
HIP 94154 |
18.59 |
| 2026-05-30 00:00 |
19:11:36.85 |
-68:05:03.6 |
HIP 94154 |
16.05 |
| 2026-05-30 12:00 |
19:11:06.33 |
-68:06:01.9 |
HIP 94154 |
13.69 |
| 2026-05-31 00:00 |
19:10:35.50 |
-68:06:58.6 |
HIP 94154 |
11.64 |
| 2026-05-31 12:00 |
19:10:04.36 |
-68:07:53.6 |
HIP 94154 |
10.13 |
| 2026-06-01 00:00 |
19:09:32.91 |
-68:08:46.8 |
HIP 94154 |
9.41 |
| 2026-06-01 12:00 |
19:09:01.16 |
-68:09:38.3 |
HIP 94154 |
9.68 |
| 2026-06-02 00:00 |
19:08:29.12 |
-68:10:28.1 |
HIP 94154 |
10.90 |